Question !
Published on Oct. 28, 2020, 7:28 p.m.

An African American couple has produced two children with sickle cell disease. They have asked why this disease seems to be more common in the African American population than in other U.S. populations. Which of the following factors provides the best explanation?

  1. Consanguinity

  2. Genetic drift

  3. Increased gene f low in this population

  4. Increased mutation rate in this population

  5. Natural selection 

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